import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.SynchronousQueue;

public class BlockingQueueDeom {
    public static void main(String[] args) {
        BlockingQueue queue = new SynchronousQueue<>();
        
    }
}
